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Cluster Network Degraded alerts reported multiple times due to errors on cluster ports

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Category:
fas-systems
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hw
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Applies to

  • ONTAP 9.x
  • NetApp CN1610 Cluster Switch

Issue

  • Following cluster network degraded autosupport notification is received multiple times:

HA Group Notification (CLUSTER NETWORK DEGRADED) ALERT

  • Multiple errors are reported on cluster ports of all the nodes except for one cluster port as seen in RECEIVE section of IFSTAT output.
  • Cluster ports with multiple errors (Error symbol, Illegal symbol etc):

clustershell::>system node run -node <nodename> -command ifstat -a

-- interface e0b (219 days, 5 hours, 16 minutes, 2 seconds) --
RECEIVE
 Frames/second:    2301  | Bytes/second:      3785k  | Errors/minute:          0
 Discards/minute:     0  | Total frames:       154g  | Total bytes:         176t
 Total errors:    43918  | Total discards:       65  | Multi/broadcast:    4452k
 No buffers:          0  | Non-primary u/c:       0  | L2 terminate:       14908
 Tag drop:            0  | Vlan tag drop:         0  | Vlan untag drop:        0
 Vlan forwards:       0  | CRC errors:            0  | Runt frames:            0
 Fragment:            0  | Long frames:          65  | Jabber:                 0
 Error symbol:    29328  | Illegal symbol:    14590  | Bus overruns:           0
 Queue drop:          0  | Xon:                   0  | Xoff:                   0
 Jumbo:           5634k  | JMBuf RxFrames:     162g  | JMBuf DrvCopy:      27146

  • Single cluster port without errors:

clustershell::>system node run -node <nodename> -command ifstat -a

-- interface e0b (219 days, 7 hours, 2 minutes, 24 seconds) --
RECEIVE
 Frames/second:    1092  | Bytes/second:       950k  | Errors/minute:          0
 Discards/minute:     0  | Total frames:     47631m  | Total bytes:         107t
 Total errors:        0  | Total discards:     1159  | Multi/broadcast:    4473k
 No buffers:       1087  | Non-primary u/c:       0  | L2 terminate:         302
 Tag drop:            0  | Vlan tag drop:         0  | Vlan untag drop:        0
 Vlan forwards:       0  | CRC errors:            0  | Runt frames:            0
 Fragment:            0  | Long frames:          50  | Jabber:                 0
 Error symbol:        0  | Illegal symbol:        0  | Bus overruns:          22
 Queue drop:          0  | Xon:                   0  | Xoff:                   0
 Jumbo:           2769m  | JMBuf RxFrames:        0  | JMBuf DrvCopy:          0

 

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